这座城市是活着的纪念碑。在呼吸与脉动中，勇敢地面对21世纪。
The city should be a living monument, breathing and pulsating, facing the 21st Century without fear.
针对飞机地面压力加油管路系统通向油箱的管路压力脉动现象，本文提出一种新的实时主动流量控制方法。
Aimed at the pressure transient of the aircraft refueling pipeline, a new real time flow control method based on the traditional passive accumulator is presented in this paper.
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